on page seo tool

I want to do On page SEO for any website . What are the best way and tools to find out the on page recommendation and Suggestion

Hello, I made a free on-page SEO crawler tool. My aim is to develop more, but I'm stuck, if anyone wants to help, they can contact me. I have a problem with data analysis. I can add your LinkedIn profile on Github. used Python for data scraping, MYSQL for data storing, HTML, Bootstrap, PHP for...